31140021211001 has 4 divisors (see below), whose sum is σ = 31153721178612. Its totient is φ = 31126321243392.

The previous prime is 31140021210941. The next prime is 31140021211021. The reversal of 31140021211001 is 10011212004113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18970388961001 + 12169632250000 = 4355501^2 + 3488500^2 .

It is a cyclic number.

It is not a de Polignac number, because 31140021211001 - 2⁶ = 31140021210937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31140021211021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6849980396 + ... + 6849984941.

It is an arithmetic number, because the mean of its divisors is an integer number (7788430294653).

Almost surely, 2^{31140021211001} is an apocalyptic number.

It is an amenable number.

31140021211001 is a deficient number, since it is larger than the sum of its proper divisors (13699967611).

31140021211001 is a wasteful number, since it uses less digits than its factorization.

31140021211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13699967610.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 31140021211001 its reverse (10011212004113), we get a palindrome (41151233215114).

The spelling of 31140021211001 in words is "thirty-one trillion, one hundred forty billion, twenty-one million, two hundred eleven thousand, one".